#include <iostream>
#include <cstring>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>

void Usage(const std::string &proc)
{
  std::cout << "\n\rUsage: " << proc << " serverip serverport\n"
            << std::endl;
}

// ./tcpclient serverip serverport
int main(int argc, char *argv[])
{
  if (argc != 3)
  {
    Usage(argv[0]);
    exit(1);
  }
  std::string serverip = argv[1];
  uint16_t serverport = std::stoi(argv[2]);

  struct sockaddr_in server;
  memset(&server, 0, sizeof(server));
  server.sin_family = AF_INET;
  server.sin_port = htons(serverport);
  inet_pton(AF_INET, serverip.c_str(), &(server.sin_addr));

  while (true)
  {
    int cnt = 5;
    int isreconnect = false;
    int sockfd = 0;
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0)
    {
      std::cerr << "socket error" << std::endl;
      return 1;
    }
    do
    {
      // tcp客户端要不要bind？1 要不要显示的bind？0 系统进行bind，随机端口
      // 客户端发起connect的时候，进行自动随机bind
      int n = connect(sockfd, (struct sockaddr *)&server, sizeof(server));
      if (n < 0)
      {
        isreconnect = true;
        cnt--;
        std::cerr << "connect error..., reconnect: " << cnt << std::endl;
        sleep(2);
      }
      else
      {
        break;
      }
    } while (cnt && isreconnect);

    if (cnt == 0)
    {
      std::cerr << "user offline..." << std::endl;
      break;
    }

    // while (true)
    // {
    std::string message;
    std::cout << "Please Enter# ";
    std::getline(std::cin, message);

    int n = write(sockfd, message.c_str(), message.size());
    if (n < 0)
    {
      std::cerr << "write error..." << std::endl;
      // break;
    }

    char inbuffer[4096];
    n = read(sockfd, inbuffer, sizeof(inbuffer));
    if (n > 0)
    {
      inbuffer[n] = 0;
      std::cout << inbuffer << std::endl;
    }
    else
    {
      // break;
    }
    // }
    close(sockfd);
  }

  return 0;
}